5-60 750/760 Feeder Management Relay GE Multilin
5.6 S5 PROTECTION 5 SETPOINTS
5
Figure 5–24: NEGATIVE SEQUENCE IOC LOGIC
d) NEGATIVE SEQUENCE DIRECTIONAL
PATH: SETPOINTS ÖØ S5 PROTECTION ÖØ NEGATIVE SEQUENCE ÖØ NEG SEQ DIRECTION
The negative sequence directional feature controls the operation of all negative sequence overcurrent elements and allows
them to discriminate between forward or reverse faults. Refer to Phase Directional OC on page 5–39 for more details on
directional principles. The operating current and polarizing voltage is shown in the following table. If the polarizing voltage
drops below the
MIN OPERATING VOLTAGE value, the direction defaults to forward.
NEG SEQ DIRECTION
[ENTER] for more
NEG SEQ DIRECTIONAL
FUNCTION: Disabled
Range: Disabled, Alarm, Latched Alarm, Control
NEG SEQ DIRECTIONAL
RELAYS (3-7): -----
Range: Any combination of 3 to 7 Auxiliary relays
NEG SEQ DIRECTIONAL
MTA: 315° Lead
Range: 0 to 359° Lead in steps of 1
MIN POLARIZING
VOLTAGE: 0.05 x VT
Range: 0.00 to 1.25 x VT in steps of 0.01
ENTER
ESCAPE
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Courtesy of NationalSwitchgear.com
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